Colored photographic image and method of producing same.



- rename E. rvns, or PHILADELPHIA, PENNSYLVANIA,

oononnn rnorocnnrmc IMAGE AND mnrnon or rnonucme SAME.

Lacie.

Specification of Letters ratent.

Patented Apr. is, rare.

Ne viewing. G'cmtinuatlon in part'of application Serial No. 149,743, filed rebruar so, 1917. This application filed October 9,1917. Serial No. 195,508.

- To all whom it may concern:

Be it known that I, Fnnnnnro E. Ivns, a

' citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Colored Photographiclmages and Methods of Producing Same, of which the following is a specification. v

This invention is a colored photographic image and method of producing same. This case forms acontinuation in part of my application Serial No. 149,743, filed February 20, 1917, patented Sept. 10,1918, Patent No. 1,27 8,667 entitled Color photography and relating to the making of a multi-color photograph or picture compounded of blended mnlti-color images. The features of the present invention are included or employedin carrying out the invention of the parent application-L The featnres'of the present invention, however, are useful in other ways than as described in the parent applicationand may be of value in photography generally, as well as the so-called color photography. The present invention indeed may refer to anyphotographic image whether negative, positive, or diapositive, and the method of producing the same, whether for the purposes of color photography, monochrome photography, motion picture photography, or other branches of the art.

/ verted into a col As an instance or embodiment of the principles of the present invention, I will describe the production of a red positive or a diapositive image; and we may presuppose a suitable negative such as the ordinary blackor silver haloid negative, which in the case of color photography may be one of set-of color-selection negatives representing,

for example, the green elements-of the sub.

ject;

, The method may commenceby' printing an ordinary black diapositive or otherpositire which may be done in a well known manner for example by mereiy os'ing a silver hlaloid sensitive plate or film'bencath the negative and sloping; inlthe usual way. Next, this black positive isto be conpositive in accordance withmy invention. 7 s

This may be efieetedtby a' copper-toning process by which the silver image is converted into a copper-red image which, however, is not always desirable in depth and hue of color, and, as will subsequently be explained, is preferably further treated to afford a satisfactory and permanent colored photographic image of the proper depth and The silver or black positive is soaked one or more hours in a copper-toning solutlon made up of the following solutions:

. Sohotz'on A. 1 Potassium ferricyanid 3.2 grams.

Potassium citrate 15.5 grams. Water .570 c. c.

vS'olutiovt B.

Cupric sulfate 4 grams. Potassium citrate 15.5 grams.

'Water 570 c. c.

(hyp

T have now produced a co per-toned image which, however, is vusua y insuificiently deep or bright, or not of the desired hue, for color photography or other photographic purposes. I have discovered that the copper-toned image is capable of acting as an extremel eficient mordant for basic dyes, and the principle of the present invention is the production of the colored image by a combined copper-toning and mordantdye process; I believe it to be new with me to produce a copper-toned image and then utilize the same for the mordanting of suitable dyes so'as to strengthen or modify the photographic image to the desired depth and hue. The final image consists of the copper-red image combined .with the mordant-dyed image.

In its broader aspect the invention may be carried out by subjecting the copper toned image havin a reddish color, to a bath of any soluble ye capable of being selectively mordanted by the copper image. Not only any stage of the complete process, although I prefer to effect the dyeing after the dissolving out of the silver salt so to permit the exercise of the judgment by inspection and l the stopping of the dyeing process at the most satisfactory point.

-Having the copper-red positive free of the silver salt, this may be soaked in the selected dye bath, for example an equeous solution of fuchsin dye containing a small quantity of acetic acid. Owing to the fact that copper is an efiective mordant for certain alkali or basic dyes including the one mentioned, the

positive is caused to take up selectively a substantial amount of the fuchsin dye. After this treatment the positive should be washed out in water containing weak acetic acid so as to remove the unmordanted part of the dye from the colloid or gelatin containing the image. When dry the positive is completed.

The copper-toned and mordant-dyed image of this invention I find easy to produce and easily controllable during the process; and the image is particularly advantageous for 001011 1 photography as no interference .is caused with the successful blending of the image with images of other colors, for example a cyanotype blue image produced either before or after the mordant dyeing of the present invention.

The present process is very elastic since the finished print may be tried out in the projection lantern or otherwise, and if it is found that the color is not exactly as desired it may be further modified either by adding or subtracting color almost as readily as in initially carrying out-the process. The color may be enhanced by further mordant dyeing'or may be reduced by soaking in acidified water.

In one aspect it will be seen that this invention consists in first forming an insoluble or pigment image of material having strong capacity for mordanting and then remforcing the image by dye bath treatment,

' the dye being mordanted selectively so as to strengthen or'modify the original image.

. The fuchsin dye mentioned will give a purpllsh red result, whereas an orange red may be obtained by the .useof auramine dye; anda mixture of the two or other dyes may be employed so as to secure the results which are dictated by experience, and the character of the subjects. An example of a satisfactory mlxed bath is as follows;

Acetic acid 8 The dyes may be first dissolved in a little alcohol and then added to the water, and the after th dissolving out ofthe silver salt and sometim s when the silver image is thin the fixing thereof may be entirely omitted.

It will thus be seen that I have described a color photographic image and method of producing the same, embodying the principles and attaining the advantages of the present invention. Sincefmany matters of order of procedure, particular ingredients and colors, and other features may be variously modified without departing from the under- 1 lying principle, I do not intend to limit the invention except in so far as specified in the pending claims.

What is claimed is:

1. For multi-color photography a red age comprising a colloid layer'containing a copper-toned image of a reddish color, the same reinforced by a red dye image selectively mordanted by the copper-toned image.

2. The process of producing a color photographic image consisting in copper-toning a silver image, thereafter "dissolving out the opaque silver salt, and thereafter subjecting the image to a bath of soluble dye capable of being selectively mordanted by the copper image.

3. The process of producing a red photographic image consisting in copper-toning a su jecting the reddish copper-toned image to a bath of soluble red dye capable of being selectively mordanted by the reddish coppertoned image.

4. The process of producing a red positive consisting in first producing-a black silver positive and then copper-toning it to a red color and dissolving out the silver, and finally subjecting it"to a bath of red'dye capable of bein selectively mordanted by the copper.

5. e dpr fi ss of converting a silver image into'a re image consisting in copper-toning it'j 'alid subsequently subjecting it to a bath of soluble red dye capable of being selectively mordanted by the coppeiuf In testimony whereof," I have aflixed my signatureheretoz 1 FREDEBIQ E. IVES. 

